[Gasification] heat exchanger flow

[Kevin Chisholm]

Dear Toby

Laminar flow occurs when the Reynolds Number is less than about 1700. 
Turbulent Flow occurs when the Reynolds Number is greater than about 1900.

Heat transfer is always better when the Reynolds Number is greater than 
1900.

Do Googles on "Reynolds Number", "Heat Transfer turbulent flow", 
boundary layer" "maximum heat transfer rate", "heat transfer rate 
prediction", etc

Best wishes,

Kevin


Toby Seiler wrote:
> Oscar, Jim and list,
> 
> Turbulence in flow is not going to improve heat transfer.  Is it
> possible the term has been misapplied?  Turbulence causes resistance
> to flow.  Wiping the surface with lots of molecules moves the heat
> along.  If you restrict the flow, there are less molecules to do the
> transfer thing.  Please provide a reference so I can understand what
> may be referred to as "turbulent" flow versus "swirl" or convoluted
> flow path in heat exchange.
> 
> Regards,  Toby Seiler
> 
> 
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